﻿using System;
using System.Net;
using System.Windows;
using System.Text;
using System.Collections;
using System.Collections.ObjectModel;
using System.Collections.Generic;
//using DailyBread.DataServiceReference;
//using System.Data.Services.Client;
using System.Diagnostics;
using System.IO;
//using System.IO.IsolatedStorage;
using System.Linq;
using System.Xml;
using System.Reflection;

namespace OurDailyBread.Helpers
{
    public class Util
    {
        //private static DailyBreadDataServiceContext commentContext = null, favContext = null, logContext = null;

        //Replace the host server and port number with the values
        // for the test server that is hosting your data service instance.
        //private static Uri svcUri = new Uri("http://localhost:52021/DailyBreadDataService.svc");
        private static Uri svcUri = new Uri("http://dailybreadprod.cloudapp.net/DailyBreadDataService.svc");
        private const string httpPrefix = "http://odb.org/";

        static Util()
        {
            //commentContext = new DailyBreadDataServiceContext(svcUri);
            //favContext = new DailyBreadDataServiceContext(svcUri);
            //logContext = new DailyBreadDataServiceContext(svcUri);

        }


        public static Uri GetNavUrl(DateTime date)
        {
            StringBuilder urlToNavigate = new StringBuilder(date.Year.ToString(), 20);
            urlToNavigate.Append('/');
            if (date.Month < 10)
                urlToNavigate.Append('0');
            urlToNavigate.Append(date.Month);
            urlToNavigate.Append('/');
            if (date.Day < 10)
                urlToNavigate.Append('0');
            urlToNavigate.Append(date.Day);
            urlToNavigate.Insert(0, httpPrefix);
            urlToNavigate.Append("/");
            Uri uri = new Uri(urlToNavigate.ToString(), UriKind.Absolute);
            return uri;
        }

        public static string GetShortNavUrl(DateTime date)
        {
            StringBuilder urlToNavigate = new StringBuilder(date.Year.ToString(), 20);
            urlToNavigate.Append('-');
            if (date.Month < 10)
                urlToNavigate.Append('0');
            urlToNavigate.Append(date.Month);
            urlToNavigate.Append('-');
            if (date.Day < 10)
                urlToNavigate.Append('0');
            urlToNavigate.Append(date.Day);
            return urlToNavigate.ToString();
        }



        

        #region html manipulation
        public static string ConvertExtendedASCII(string HTML)
        {
            string retVal = "";
            char[] s = HTML.ToCharArray();

            foreach (char c in s)
            {
                if (Convert.ToInt32(c) > 127)
                    retVal += "&#" + Convert.ToInt32(c) + ";";
                else
                    retVal += c;
            }

            return retVal;
        }

        public static string StripHTML(string source)
        {
            try
            {
                string result;

                // Remove HTML Development formatting
                // Replace line breaks with space
                // because browsers inserts space
                result = source.Replace("\r", " ");
                // Replace line breaks with space
                // because browsers inserts space
                result = result.Replace("\n", " ");
                // Remove step-formatting
                result = result.Replace("\t", string.Empty);
                // Remove repeating spaces because browsers ignore them
                result = System.Text.RegularExpressions.Regex.Replace(result,
                                                                      @"( )+", " ");

                // Remove the header (prepare first by clearing attributes)
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"<( )*head([^>])*>", "<head>",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"(<( )*(/)( )*head( )*>)", "</head>",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         "(<head>).*(</head>)", string.Empty,
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);


                // remove all scripts (prepare first by clearing attributes)
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"<( )*script([^>])*>", "<script>",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"(<( )*(/)( )*script( )*>)", "</script>",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                //result = System.Text.RegularExpressions.Regex.Replace(result,
                //         @"(<script>)([^(<script>\.</script>)])*(</script>)",
                //         string.Empty,
                //         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"(<script>).*(</script>)", string.Empty,
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);

                // remove all styles (prepare first by clearing attributes)
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"<( )*style([^>])*>", "<style>",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"(<( )*(/)( )*style( )*>)", "</style>",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         "(<style>).*(</style>)", string.Empty,
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);

                // insert tabs in spaces of <td> tags
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"<( )*td([^>])*>", "\t",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);

                // insert line breaks in places of <BR> and <LI> tags
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"<br />", "\r",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"<( )*li( )*>", "\r",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);

                // insert line paragraphs (double line breaks) in place
                // if <P>, <DIV> and <TR> tags
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"<( )*div([^>])*>", "\r\r",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"<( )*tr([^>])*>", "\r\r",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"<( )*p([^>])*>", "\r\r",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);

                // Remove remaining tags like <a>, links, images,
                // comments etc - anything that's enclosed inside < >
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"<[^>]*>", string.Empty,
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);

                // replace special characters:
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @" ", " ",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);

                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"&bull;", " * ",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"&lsaquo;", "<",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"&rsaquo;", ">",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"&trade;", "(tm)",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"&frasl;", "/",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"&lt;", "<",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"&gt;", ">",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"&copy;", "(c)",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"&reg;", "(r)",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                // Remove all others. More can be added, see
                // http://hotwired.lycos.com/webmonkey/reference/special_characters/
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         @"&(.{2,6});", string.Empty,
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);

                // for testing
                //System.Text.RegularExpressions.Regex.Replace(result,
                //       this.txtRegex.Text,string.Empty,
                //       System.Text.RegularExpressions.RegexOptions.IgnoreCase);

                // make line breaking consistent
                result = result.Replace("\n", "\r");

                // Remove extra line breaks and tabs:
                // replace over 2 breaks with 2 and over 4 tabs with 4.
                // Prepare first to remove any whitespaces in between
                // the escaped characters and remove redundant tabs in between line breaks
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         "(\r)( )+(\r)", "\r\r",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         "(\t)( )+(\t)", "\t\t",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         "(\t)( )+(\r)", "\t\r",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         "(\r)( )+(\t)", "\r\t",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                // Remove redundant tabs
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         "(\r)(\t)+(\r)", "\r\r",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                // Remove multiple tabs following a line break with just one tab
                result = System.Text.RegularExpressions.Regex.Replace(result,
                         "(\r)(\t)+", "\r\t",
                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                // Initial replacement target string for line breaks
                //string breaks = "\r\r\r";
                //// Initial replacement target string for tabs
                //string tabs = "\t\t\t\t\t";
                //for (int index = 0; index < result.Length; index++)
                //{
                //    result = result.Replace(breaks, "\r\r");
                //    result = result.Replace(tabs, "\t\t\t\t");
                //    breaks = breaks + "\r";
                //    tabs = tabs + "\t";
                //}

                // strip leading spaces
                result = System.Text.RegularExpressions.Regex.Replace(result,
                            @"^\s+", String.Empty,
                            System.Text.RegularExpressions.RegexOptions.IgnoreCase);

                // That's it.
                return result;
            }
            catch
            {
                //MessageBox.Show("Error");
                return source;
            }
        }

        public static string ExtractBreadContent(string getResults)
        {
            // extract the daily bread html
            StringBuilder localContent = new StringBuilder(getResults);
            int startIndex, endIndex;

            // strip title
            startIndex = getResults.IndexOf("<div class=\"devotitle");
            endIndex = getResults.IndexOf("</div>", startIndex) + 5;
            int removedLength = endIndex - startIndex + 1;
            localContent.Remove(startIndex, endIndex - startIndex + 1);

            // strip image ref
            startIndex = getResults.IndexOf("<a href=\"/index.html\">");
            endIndex = getResults.IndexOf("</a>", startIndex) + 3;
            removedLength = removedLength + endIndex - startIndex + 1;
            localContent.Remove(startIndex, endIndex - startIndex + 1);

            startIndex = getResults.IndexOf("<div id=\"article-passage\">", endIndex);
            endIndex = getResults.IndexOf("</div>", startIndex) + 5;
            localContent.Remove(startIndex - removedLength, endIndex - startIndex + 1);
            removedLength = removedLength + endIndex - startIndex + 1;

            // remove href for reference verse
            startIndex = getResults.IndexOf("href", endIndex);
            endIndex = getResults.IndexOf(">", startIndex) - 1;
            localContent.Remove(startIndex - removedLength, endIndex - startIndex + 1);
            removedLength = removedLength + endIndex - startIndex + 1;
            startIndex = getResults.IndexOf("</a>", endIndex);
            localContent.Remove(startIndex - removedLength, 4);
            removedLength += 4;


            // remove href for article author
            startIndex = getResults.IndexOf("<a href", endIndex);
            endIndex = getResults.IndexOf(">", startIndex);
            localContent.Remove(startIndex - removedLength, endIndex - startIndex + 1);
            removedLength = removedLength + endIndex - startIndex + 1;
            startIndex = getResults.IndexOf("</a>", endIndex);
            localContent.Remove(startIndex - removedLength, 4);
            removedLength += 4;

            startIndex = getResults.IndexOf("<div id=\"bible-in-a-year\">", endIndex);
            endIndex = getResults.IndexOf("</p>", startIndex) + 3;
            localContent.Remove(startIndex - removedLength, endIndex - startIndex + 1);
            removedLength = removedLength + endIndex - startIndex + 1;

            // remove href for copyright
            startIndex = getResults.IndexOf("<a href", endIndex);
            endIndex = getResults.IndexOf(">", startIndex);
            localContent.Remove(startIndex - removedLength, endIndex - startIndex + 1);
            removedLength = removedLength + endIndex - startIndex + 1;
            startIndex = getResults.IndexOf("</a>", endIndex);
            localContent.Remove(startIndex - removedLength, 4);
            removedLength += 4;

            startIndex = getResults.IndexOf("<div class=\"footer\">", endIndex);
            endIndex = getResults.IndexOf("</div>", startIndex) + 5;
            localContent.Remove(startIndex - removedLength, endIndex - startIndex + 1);
            removedLength = removedLength + endIndex - startIndex + 1;

            return StripHTML(localContent.ToString());
        }

        public static string ExtractVerseContent(string refBibleResults)
        {
            StringBuilder refBibleVerse = new StringBuilder("<html><body>");
            int refStartIndex = refBibleResults.IndexOf("<span id=\"en-NKJV");
            int refEndIndex = refBibleResults.IndexOf("<div class=\"publisher-info-bottom", refStartIndex);
            refBibleVerse.Append(refBibleResults.Substring(refStartIndex, refEndIndex - refStartIndex));
            refBibleVerse.Append("</body></html>");
            refBibleResults = refBibleResults.Substring(refStartIndex, refEndIndex - refStartIndex);

            //strip the footnote reference
            refStartIndex = refBibleResults.IndexOf("<sup data-fn");
            while (refStartIndex != -1)
            {
                refEndIndex = refBibleResults.IndexOf("</sup>", refStartIndex);
                refBibleResults = refBibleResults.Remove(refStartIndex, refEndIndex - refStartIndex + 6);
                refStartIndex = refBibleResults.IndexOf("<sup data-fn");
            }

            //strip the cross reference
            refStartIndex = refBibleResults.IndexOf("<sup class='crossreference'");
            while (refStartIndex != -1)
            {
                refEndIndex = refBibleResults.IndexOf("</sup>", refStartIndex);
                refBibleResults = refBibleResults.Remove(refStartIndex, refEndIndex - refStartIndex + 6);
                refStartIndex = refBibleResults.IndexOf("<sup class='crossreference'");
            }

            return StripHTML(refBibleResults);
        }
        #endregion

    }
}
